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Finding the Fourth Proportional to 579,806.97, 800,140.23 and 321,688.68

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Solution

The fourth proportional to 579,806.97, 800,140.23 and 321,688.68 is: 443,934.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    579,806.97 : 800,140.23 = 321,688.68 : x
  2. Step 2: Convert to fraction form
    579,806.97/800,140.23 = 321,688.68/x
  3. Step 3: Cross multiply
    579,806.97x = 800,140.23 × 321,688.68
  4. Step 4: Simplify right side
    579,806.97x = 257,396,054,403.60
  5. Step 5: Solve for x
    x = 257,396,054,403.60/579,806.97
  6. Step 6: Final answer
    x = 443,934.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.